I use noteself for this, which is an extension of tiddlywiki using an in-browser pouchdb back-end. This can then be sync'd to a couchdb instance, which can be self-hosted - which is what I do.

It's perfect for my needs, I need to work out setting up separate databases for separate note purposes (keeping personal and work separate). I find tiddlywiki / noteself's structure perfect for the various streams required for the management of projects.